Ah congratulations in getting your new MB. The fans are indeed quiet but try doing a hardware test or playing CoD2 on it and the fans will run at full speed (6200RPM).
true, after 30 seconds of yes>/dev/null my temp rose to 75-80 degrees and the fan start blowing at 5800. I've stop both terminal and the temp whent down very rapidly. But without any demanding task, it's running between 50 and 60 and the fan is quiet.
I'm not shure if this rapid increase in temperature is normal on a laptop ?
anyway, right now, I'm really happy with it The first day is the best one